 <html>
     <head>
         <title>样式规则</title>
         <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
          <link type="text/css" rel="stylesheet" href="../css/index3.css" />
     </head>
     <body>
         <h2>静夜思</h2>
         <p>床前明月光，</p>
         <p>疑是地上霜。</P>
         <p>我是郭德刚，</P>
         <p>低头思故乡。</P>
     </body>
</html>